Assigknoe to william h



H. T: SPENCER. Stop-Motion for Railway-Heads.

Patented June 1,1880.

lnuentoyz Henry T. $Pgncen:

Witnesses: v @7226 N.PETERS, PHOTO-LITHOGRAPHER, WASHINGTON, D C

lhvrrnn STATES ArnNr Erica.

HENRY T. SPENCER, OF \VATERVILLE, MAINE, ASSIGNOB TO WILLIAM H. K.ABBOTT, OF SAME PLACE.

STOP-MOTION FOR RAI LWAY-HEADS.

SPECIFICATION forming part of Letters Patent No. 228,407, dated June 1,1880.

Application filed January 5, 1880.

To all whom it may concern:

Be it known that I, HENRY T. SPENCER, of \Vaterville, in the county ofKennebec and State of Maine, have invented certain new and usefulImprovements in Stop-Motions for Railway-Heads; and I do hereby declarethat the following is a full, clear, and exact description of theinvention, which will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification.

The object of my invention is to provide a simple, quick-working, andeasily-adjustable stop-motion for raihvay-heads; and the noveltyconsists, in general, of certain changes in the construction andcombination of the parts, whereby the sliver is prevented from lapping,the rolls kept clear, and the stop-motion is entirely within the body ofthe machine, readily adjustable, and is provided with an alarmmechanism, and in kindred details, all as will now be more fully set outand explained.

Having thus described the nature of my invention in general terms, I nowproceed to set forth in detail its construction and mode of operation,reference being had to the accompanying drawings, in which Figure 1shows front elevation. Fig. 2 shows section through 00 m of Fig. 1 withalarm mechanism omitted. Fig. 3 shows plan or top view with parts cutaway.

B B are the calender-rolls of a railway-head. A is trumpet, and Atrumpet-standard. Attached to the standard A are two plates or clearers,(of suitable material,) a and a, the edges of which come near thesurface of the upper and lower rolls, respectively. The edges of theseplates or clearers a and a are presented to the'rolls in such a way thatthey may serve to scrape off any substance which adheres to them.

The trumpet-standard A is secured to the shaft 0, which is held in itsbearings c c. Fastened to another part of the shaft 0 is the lever D,which extends back under the bed of the machine; and on the back end ofthe lever D, which is free to move up and down as the shaft 0 turns, isa plate, D, containing the vertical slot d. Passing through the slot (1is the end of the bent lever E, the other end of which is secured to thecam or button F, pivoted at f.

G is a lever pivoted at g, one end of which 5 touches the under side ofthe cam F. The cam F is of such form that whatever way it may be turnedit bears down the end of the lever G, which is directly beneath it, andraises the opposite end G.

Hinged to G. at G is the vertical rod H, extending downward and heldfrom any lateral movement by the guides or bearings k and h. It is,however, free to move up and down.

A spiral spring, h, is on the rod H, so placed that it forces the rod Hdownward at all times, and the adjustable stop h-, against which thespring bears, may be moved up or down on the rod, thus varying thetension of the spring h.

The lower end of the rod H fits into a notch,

i, in the horizontal rod I. On the rod I is the spiral spring 6, whichwould force the outer end of the rod I against the belt-shipper J wereit not held back by the end of the rod H fitting into the notch t. K isthe loose pulley.

On the under side of the bed of the machine is a hell, 0, and extendingdownward from the bell, its upper end being in position to strike it, isthe lever M. This lever is pivoted at m, above which is attached aspring, N, which draws the upper end of the lever toward the bell O.

The lever M is prevented from coming against the hell 0, when thestop-motion has not been sprung, by its rounded lower end coming againstthe semicircular projection m on the top side of rod I.

Having thus described the construction of my invention, I now proceed todescribe its mode of operating.

When the sliver of cotton is passing through the trumpet its tensionholds the lever D in about the same position at all times, though 5there will be a limited vibration up and down. hen, however, a lumppasses into the trumpet or the sliver breaks, the end of the lever D iseither lifted or allowed to fall by its own weight, so that one end orthe other of the slot (1 hits the end of the lever E, which passesthrough it. The motion of lever E is communicated to cam I, and this camturning either way forces down one end of the lever Gr, raising itsopposite end G, bearing the rod I-I. Rod H is lifted out of its notch tin the rod I, and the spring t" is then free to force the shipper J,carrying its belt, upon the loose pulley K, as shown by dotted lines,Fig. 1, and the machine is stopped. \Vheu the shipper J is pushed backinto place to start the machine the notch t moves back and allows theend of the rod H to fall into it, and the stop-motion is then set andready to operate, as above described. The clearers a and a ordinarilyscrape off what substances stick to the calender-rolls B B, eitherforeign matter or the sliver itself, which sometimes winds itself aroundthe roll and, breaks it. If anything does stick to the rolls which thescrapers cannot easily remove, the trumpet-standard A is thrown back bythe substance striking the edge of one of the clearer-s, and the machineis stopped, as before described. When the rod I is forced outward by theaction of the spring i, the projection in, coming against the lower endof the lever M, draws the upper end away from the bell O, and as thelower end passes over the projection on the spring N pulls the upper endof the lever M against the bell 0, thus striking the alarm. The objectof this alarm is to notify the operative, who generally has charge ofmore than one machine, that the railway-head has stopped.

It will be observed that the force applied to the rod II must besufficient to overcome the tension of the spring h, but the tension of hcan be regulated by the stop h, and in this way I can make mystop-motion more or less sensitive-that is, I can make a greater or lessforce exerted at the trumpet, and thence to the rod H, necessary to stopthe machine.

The manner in which the cam F acts on the lever G is such that it takesa greater force acting upward on the lever E to stop the machine thandownward. This is desirable from the fact that when a sliver breaks theweight of the lever D is what is exerted on E to stop the machine, whileit may be necessary to allow a much greater pressure in the other direction without springing the stop-motion.

The form of cam F may be made so that a still greater difference will berequired between the upward and downward force exerted by the lever D.

It is evident that a considerable variation can be made in the manner ofconstructing my invention without essentially changing its principle.Many different forms of alarm may also be used.

Instead of notch via pin may be used. Spring It may also be applied tolever G with the same effect as at H.

The principal advantages which my stopmotion possesses over thosehitherto in use are that it prevents the sliver from lapping, keeps therolls clear, forms a simple, easily made, cheap, and readily-adjustablestop-motion,not liable to get out of order. It is entirely within thebody of the machine, and it is provided with an alarm mechanism.

What I claim as new, and wish to secure by Letters Patent, is

1. In a railway head, the combination of trumpet A, clearers a a, shaft0, and lever D, having slot d, with rod H, spring h, and intermediatemechanism between lever D and rod H, and rod I, notch 6, spring 1, andprojection m, and the alarm mechanism, substantially as and for thepurposes set forth.

2. In a railway-head, the combination of the lever D, having slot 01,lever E, cam I and lever G, with rod H, spring h, and rod I, with itsspring 'i and projection m, and alarm mechanism, substantially as andfor the purpose set forth.

3. In a railway-head, the combination, with alarm mechanism, of rod Hand spring h, rod I, and belt-shipper J, the rod I having notch i,spring 1', and projection m, to operate the said alarm, substantially asand for the purposes set forth.

4. In a railway-head, the combination of rod 1, having notch i andspring 1', rod H, lever D, and intermediate mechanism between rod H andlever D, consisting of lever G, cam F, and lever E, substantially as andfor the purpose set forth.

In testimony that I claim the foregoing as my own I aflix my signaturein presence of two 100 witnesses.

HENRY T. SPENCER.

Witnesses:

S. W. BATES,

A. H. PLAISTED.

